These are not "COR-BON" bullets. Cor-bon is using the Barnes-X pistol bullet to make loadings for 9mm, 357, 40, 44, and 45 (hence the name of the round dpX ... it's short for deep penetrating X or something like that). The X bullet has proven itself as reliable in all sorts of hunting applications, and this is one of the best designs for a bullet I've seen. I have some of them, and they run around 20$ (typical for good +p defensive ammo). According to all the testing done on them, they are excellent rounds for carry and all defensive needs. I hope I don't have to use them, as they are a guaranteed lethal blow (six perfect petals).
I little aside here, I've pulled some of these from targets where I could recover the bullets. The bullet I have recoved, looks exactly what is pictured in the Barnes "promotional" material. I can't say the same for most of the "jacketed lead" bullets I've pulled out. They will perform "as advertised".